Zuko had recently joined Team Avatar. Every time he's simply in your presence, he goes silent. While training firebending with Aang, he nearly lit himself on fire since he couldn't keep his eyes off of you. After training with Aang, he decided to finally talk to you since he hadn't since he joined.

"Hey, Zuko here- no wait, well, yeah, me, but..Ugh! I meant, I'm Zuko..And you're..?" He's bright red and not facing you.